After your brain, the human eye is one of the most complex organs in your body.
Optometry Australia reveals that there are hundreds of interesting facts about the human eye. Here are some of the most fascinating facts about this 550 million year old organ.
We blink around 10-15 times a minute and around 6.3 million times a year.
Our eyeballs remain the same size from birth to death, while our noses and ears continue to grow.
An eye is composed of more than two million working parts, including over one million nerve fibres connecting each eye to the brain. Because of all these connections, it is currently not possible to transplant an eye.
The most active muscles in our body are those that control our eyes.
An iris has 256 unique characters, 6.4 times more than a fingerprint, making a retina scan ideal for security.
An average eyeball is 24 millimetres wide and weighs only 28 grams, yet it contains around 107 million light sensitive cells.
Our eyes are mere cameras that capture light and send the data back to the brain to be interpreted into shapes, colours and images.
Our retinas actually perceive the world upside down. Our brain flips the image the right way up for us.
The human eye can see 500 shades of grey.
Red, blue and green are the only colours we can see. All other colours are a combination of them.
Our eyelashes keep dirt out of our eyes, while our eyebrows prevent sweat dripping into them.
If you have blue eyes, you share a common ancestor with every other blue-eyed person in the world.
Your eyes don’t show signs of many eye diseases, such as glaucoma and macular degeneration, until it is too late to reverse their effects, leading to serious visual impairment and often blindness.
To protect these incredibly precious organs, Optometry Australia recommends regular eye examinations throughout life. To find an optometrist near you and to learn more about your eyes go to goodvisionforlife.com.au.